Mining machine



Nov- 4 9 H. R. STRAIGHT MINING MACHINE Filed Avril 11, 1922 4Sheets-Sheet 1 Nov. 4 4- 1,514,269

H. R. STRAIGHT MINING MACHINE Filed Anril 11, 22 4 Sheets-Sheet 2 Nov. 41924.

H. R. STRAIGHT MINING MACHINE 'Filed April 11, 1922 4 Sheets-Sheet 5 r0I, r///- Nov. 4 1924. 1,514,269

H. R. STRAIGHT MINING MACHINE Filqd Abril 11, 22 4 Sheets-Sheet 4Patented Nov. 4, 1924.

HALVERCR. STRAIGHT, OF ADEL, IOWA.

MINING MACHINE.

Application filed Aprill 11, 1922.

To all whom it may concern:

Be it known that I, HALVER R. STRAIGHT, a citizen of the United States,residing at Adel, in the county of Dallas, State of Iowa, have inventeda certain new and useful Mining Machine, of which the following is aspecification.

This invention relates in. particular to mining machines for miningcomparatively hard substances.

The object of my invention is to provide a mining machine of simple,durable and inexpensive construction adapted to automatically mine anddeliver a comparatively hard material to suitable cars.

further object is to provide an automatic mining machine adapted to mineand remove a comparatively hard material in small chunks of acomparatively uniform size and provided with means whereby the averagesize of the chunks may be considerably varied.

A further object is to provide a machine adapted to automatically mine amaterial from under-ground and from a tunnel or entrance or rectangularcross section, the vertical and horizontal dimensions of which aregreater than the transverse dimensions of the machine.

)i further object is to provide in a min ing machine, an improved headprovided with a series of pneumatic or electric chisels which may beutilized to cut the material loose, and so arranged and controlled thata cut of uniform depth may be made substantially across the entiresurface from which the material is removed.

There are other objects which may be apparent to those skilled in theart, and which need not be enumerated here in detail.

My invention consists in the construction, arrangement and combinationof the various parts of a device, whereby the objectscontemplated areattained as hereinafter more fully set forth, pointed out in my claimsand illustrated in the accompanying drawings, in which:

Figure 1 is a plan'view of my improved mining machine with a portion ofthe rear end broken away.

Figure 2 is a longitudinal sectional view taken on the line 2-2 ofFigure 1.

Figure 3 is a front elevation of the device showing the manner in whichit is mounted in the tunnel formed by the cutters.

Serial No. 551,696.

Figure at is a detailed sectional view taken on the line 14 of Figure 2illustrating the control mechanism for the cutters.

Figure 5 is a detail sectional view of the same taken on the line 5-5 ofFigure 4.

Figure 6 is a detail sectional view taken on the line 6-6 of Figure 1.

Figure '7 is a plan detail sectional view taken on the line 77 of.Figure 2.

Figure 8 is a detail plan view of the lower portion of the mainelevating conveyor, together with a segment of the transverse conveyor.

Referring to the accompanying drawings, I have used the referencenumeral 10 to indicate a track, on which my improved mining machine ismounted. The'machine com prises a supporting frame having side members11 and 12, and transverse members 13, upon which the members 11 aremounted. The members 13 are provided with bearings 14: which are securedto short longitudinal members 15.

Rotatively mounted in the bearings 14 are shafts 16, each of which aredesigned to carry flanged wheels 17, the said wheels being designed toengage the track 10.

The rear end of my machine is provided with a transverse member 18rotatively in which is mounted. an axle 19 designed to carry suitableflanged wheels 20. The members 11 are designed to extend forwardly overthe members 13 and are provided at their forward ends with a transversechannel iron 21. The side members 12 are sup,- ported above the members11 by means of channels 22 and 23. The forward endsof the members 12 arevertically above the forward ends of the members 11 and .are providedwith a channel24e similar to the channel 21. The upper sides of thechannels 24t'and 21 are provided with a rail 25. The members 22 and 23are provided with cross members 26 which form braces for the frame work.e V

For advancing this supporting frame, I have provided worm gear 27 on thecentral portion of the shaft 19, which is designed tomesh with the worm28 rotatively, mounted in a bearing 29, said bearing 29 being secured tothe lower side of the transverse member 18.- Secured transversely aheadof the member 18, I have provided a plate .30,

'the lower side of which is designed to carry a motor 31, the shaft ofwhich is operative- 1y connected with the worm 28. Suitable electricwires 32 are provided which lead to a suitable control of the ordinaryconstruction. By this arrangen'ient it will be seen that by throwing themotor 31 in operation, the worm 28 will be rotated which will cause theworm gear 27 to be rotated and the supporting frame advanced or movedrearwardly, according to which di rection the motor 31 is rotated.

For cutting the material, I have provided a carriage 33which is providedwith flanged wheels 34, designed'to rest on the tracks 25. This frame 33is provided with an opening 35 near its central portion.

The lower left hand wheel, as shown in Figure 1 of the drawings isprovided with a rearwardly extending aXle 36 which is mounted in a frame37. The frame 37 is secured to the back of the frame 33 by meansof'bolts 38. A rail 39 is provided transversely across the members 11and parallel with the lower rail 25. A wheel 40 is provided on the'rearend of the shaft 36 and designed to rest on the rail 39. The centralportion of the shaft 36 is provided with a worm gear. 41', which is inmesh with the worm 42', the said gears being mounted in a suitableoil-tight case 43. This case 43 is mounted on the frame 37. a

A motor 44 is mounted on the fram 37, the shaft of which is operativelyconnected with the worm 42. Suitable electric wires andcontrollingdevices are connected with said motor, and so arranged thatit may be operated in either direction. By this arrangement it will beseen that the frame 33 may be moved transversely across the forward endof the supporting frame by operating the motor 44, the speed of whichmay be regulated by regulating the speed of the said motor. frame 33, Ihave provided a vertical slide bar 45, which is secured in positionbymeans of guide members 46. The slide bar 45 is provided with forwardextending hearing members 47 in which is rotatively mounted a verticalshaft 48. The shaft 48 isp'rovi'ded with a series of diverging andreciprocating cutting members 49. Each of the cutting members 49 isprovided with a reciprocating cutter 5O sharpened at its ou-ter 'end.These cutter-s are preferably of the pneumatic type similar to hepneumatic drills of ordinary construction. Each of the cutters 49] isprovided with a' supporti-ng'sho'ulder 51 havingan air pipe 52 castintegral, through which air may be admitted for actuating the plungerThe pipes "52 are connected by means of a vertical pipe 54'. Mounted inthe rear end of the supporting frame, I have provided an air compressor55 which is of the ordinary construction and maybe driven by anysuitable power.

Near each end of the Near the central portion of the frame, I haveprovided an air tank 56, the said tank being 1n communlcatlon with thecompressor by means of the pipe 57. A flexible pipe 58 is provided incommunication with the tank '56. One end of the pipe 58 is provided witha Y 59 which is in communication with two pipes 60, each of whichcommunicates with one of the vertical pipes 54. A controlling valve 61is provided for each of the pipes 60, as illustrated in Figure 3.

By this arrangement it will be seen that T have provided means wherebythe cutters 50 may be actuated. that the cutter members 49 are arrangedin such a manner that one set of cutters may be actuated as the frame 33is moved in one direction, while the opposite set of cutters may beactuated as the said frame member is moved in the opposite direction. Inthis connection it is desirable that one set or battery of the cuttersbe moved from engagement withthe material while the other set is beingoperated. For accomplishing this, I. have provided a worm gear 62 oneach of the shafts 48, the said worm gear being provided with a support63 secured to the slide bar 45.

In the said support I have provided a worm 64 mounted. on a shaft 65,one end of which is provided with a bevel-gear 66' and designed to meshwith the bevel-gear 67. The bevel-gear 67 is carried by a shaft 68 whichextends through the slide bar 45 and ro-tatively mounted in a bearing69. The rear end of the shaft 68 is provided with a hand wheel 70. Byrotating the said hand wheel the shaft 48 may be oscillated in eitherdirection. By this construction, the points of either set or battery ofcutters may be independently moved, to or from the material to be mined,and any desired depth may be maintained as the cutters are operated. Thecutters will be rigidly held in position by the construction of the wormgears described.

For moving the slide bar 45 and the cutter 49 vertically, I haveprovided a rack 71 on the inner face of each of the said slide bars 45.The said rack is designed to be in mesh with the pinion 7:2 mounted on ashaft 73, the said shaft being carried in suitablebearing 74 secured tothe back of the frame 33. The opposite end of the shaft 7 3 is providedwith a worm gear 75. This worm gear is designed to be operated by meansof a worm 76 mounted on a shaft- 71, the rearend of which is providedwith a hand wheel 78,

the said shaft and worm being mounted in.

a suitable casing "79 secured to the bearing member 74, as illustratedin Figures 4 and 6 of the drawmgs. By operating the hand wheel 78, itwill be seen that the rack bars may be moved vertically relative to theframe 33. For elevating and delivering the It will be noted material,Ihave provided frame members 80 secured to the back and lower portion ofthe frame 33. Each of the frame members 80 is provided with flangedportions81 designed to form sides ofa conveyor. upper end of the sidemembers 81 is provided with a shaft 82, each end of which has mounted aroller 83. The central portion of the shaft 82 is provided with a wormgear 84. This worm gear 84 is designed to mesh wit-h a suitable worm 85,(Fig. 2). A motor 86 is provided on the frame members 80, the shaft ofwhich is designed to carry a worm 85. By operating the motor throughsuitable electrical connections, the rollers 83 may be rotated. Near thelower end of the vmembers 81, I have provided a shaft 87 designed tocarry rollers 88. On each set of rollers 83 and 88, I have provided aconveyor 89. Each of these conveyors is'provided with slats 90. Each ofthe conveyors 89 is mounted substantially back of the cutter members 49the lower ends of which are designed to operate closeto the floor ofrivet 93 secured to the back portion of said cutter member and designedto operate in a slot 94 near the forward end of said member 91. Themembers 91 and 92'are designed to move close to the floor and are soarranged that as the frame 33 is moved transversely on its tracks 25,the saidscraper members will move the material rearward in front of thelower end of the conveyor mem bers 89.

Secured to the forward side of the front member 13, I have providedtroughs 95 and 96. These troughs are designed to carry a longitudinallyarranged shaft 97, each end of which is provided with a spiral conveyor,98 and 99, the conveyor 98 being wound in the opposite direction to thatwhich the conveyor 95 is wound. The center portion of the shaft 97 isprovided with belt wheels 100. These wheels are formed with spokes so asto permit the material that is advanced forward by means of theconveyors 98j'and 99 to pass through said wheels to the space betweenthem. This space is providediwith an enlarged portion 101 which isdesigned to receive the material. Extending upward and rearward, I haveprovided an'inclined chute 102, the lower end of which. is in line withthe wheels 100 and the upper end of The l which is provided with a shaft103 upon which is mounted belt wheels 104. The chute is provided withabottom 105, the lower end of which has a curved portion 106.

This curved portion is concentric to the tion of the conveyor 107 tomove upward adjacent tothe bottom 105. The shaft 103 is rotated by meansof a belt wheel 108, which is designed to receive a belt 109, the saidbelt being driven by means of an electric motor 1.10. the mainsupporting frame. c

A chute 111 is provided adjacent to the upper end of the'conveyor 107andzis' soarranged as to receive material delivered thereby and isplaced on the supporting frame in such a manner as to convey thematerial to one side of the supporting frame, the outer end e f which isof such a length that suitable cars may be moved beneath it to receivethe delivery 'material.

The conveyors 98 and 99, together with the elevating conveyor 107, arerigidly fixed to the supporting frame, while the convoyors 89 are fixedto the carriage 38, but the upper ends of the conveyors89 are sodesigned that the material may be delivered to th conveyors 98 and 99when the carriage 33 is in any of its positions of movement. I

In practical. operation, assuming that a suitable tunnel has been formedin which to start the machine. and the machine is properly mounted, andthat the cutters 49 are in the position snown in Figure 1 of thedrawings: This figure shows the carriage 33 at its extreme rightposition. hen it is desired to operate the machine,the points 50 of theleft hand battery of cutters 49 are moved in position adjacent to thematerial to be excavated, while the points of the cutters at the righthand side of the machine are moved rearwardly to prevent them from beingdragged against the surface of the material to be mined; position, oneof the valves 61 is operated. Thispermits air from the tank 59 toreciprocate the said cutters. The motor '44 is then started, which willcause the carriage 33 to move to the left while the cutters 49 are beingoperated. After the'cutters 49 have reached the left hand position, theair will be turned off and theniotor 44 stopped, then the left handcutters will bemoved rearwardly by means of the hand wheel through thebevel-gears 67," 66, theworm gears 64 and 62. The motor 31 is then openated and the supporting frame 11 is advanced forward, afterwhichtheright hand battery of cutters 49 may bemoved int-o po- Thismotor is mounted upon After the cutters 49 :are in sition'adjacent tothe material to'be eXca- .vated. In this connection, it will be notedthat the distance between the extreme points of both batteries ofcutters, is less than one- =half of-the width of the space excavatedbysaid cutters. when the cutters are at their extreme limit of movement ineither direction, to allow the ,cutterwpoints to move to the full depthgradually from the point in which the cutters engage the material to thepoint midway between the sides of the'tunnel or en--.

trance.

It will be noticed from Fig. 3, that thecutters 49 are so arranged onthe shaft 48 in a diverging manner, that clearance may be provided forthe machinebctween the extreme top and bottom of the frame, and thebottom and top of the tunnel. In operation, thecutters' will be movedtransversely and horizontally across the supporting frame hear, or attheir extreme top position of 'IIlOVI11G'-l1li,iflfli6l which they maybe lowered by 'means' of the hand wheel 78, and the worm gears 75 and76, together with the rack 71-and the pinion 73. When the cut ters havebeen thus lowered, the machine may bereversed and moved across thetunnel'horizontally to the opposite position.

It'will also be noticed that the points of the cutters may be movedvertically at any position between the extreme upper and lower positionby operating the hand wheel 78.

I have provided a separate hand wheel for each set of cutters so thatthey may be raised and lowered independently, to

. meet the requirements of the machine as it is being operated.

As the cutters 49 are operated, the material loosened thereby, will fallto the floor adjacent to the head end of the tunnel when it will beengaged by the scrapers 91 and moved rearward to a point ahead of theele- -portion 106 and the member 101 and slide the material up theinclined bottom 105 and deliver it to the transverse chute 111, afterwhich it maybe delivered to suitable cars as above described.

' The scrapers 91 are provided with a hinge portion 92 for the purposeof moving rearward and forward with the cutter mem bers 49. The slot 94:is provided to permit the lower cutters 49 to move up and down relativetoisaid'hinge portion 92.

This enables the operator,

It will thus be seen that I have provided a mining machine, capable ofautomatically mining and delivering -material in small chunks tosuitable cars. The size of the chunks may be regulated by the amount thesupporting frame is advanced forward,,by adjusting the depth of thecutters l9 as they are moved transversely, and. by the verticaladjustment of the cutters.

By properly manipulating the points of the cutters 19, it will be seenthat a tapering cut may be formed, as the carriage 33 is movedtransversely, so that a curved tunnel or opening may be constructed. Itwill be seen that by my arrangement of cutters, that a tui'inel withvertical walls and a vertical head may be constructed.

In the drawings I have illustrated the cut ters as being operated bycompressed air, but an electric or hydraulic cutter may be substitutedfor the pneumatic cutters, without departing from the spirit of myinvention.

I claim:

1. In a device ofthe class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, a vertical series ofreciprocating cutting devices mounted on, and adapted to cut forward ofsaid carriage,

means for shifting said series of cutting devices vertically andrelative to said carriage, and means for elevating and discharging thematerial removed by said cutters.

2. In a device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, a vertical series ofreciprocating cutting devices mounted on, and adapted to cut forward ofsaid carriage, means for shifting said series of cutting devicesvertically. and relative to said carriage, means for swinging the pointsof said cutting devices transversely relative to the perpendicularmovement of said cutters, and means for elevating and discharging thematerial removed by said cutters.

3. In a device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction,a vertical series ofreciprocating cutting devices mounted on, and adapted to cut-forward of,said carriage, means for shifting said series of cutting devices in aperpendicular plane and relative to said carriage, means for moving thepoints of said cutting device transversely relative to thevertical'movement of said cutters, means for actuating said cutters,

I and means for elevating and discharging the materlalremoved by saldcutters.

4:. In a device of the class described, a

supporting frame, a carriage capable of transverse movement on saidsupporting frame, means for moving said carriage in' 5. In a device ofthe class described, a

supporting frame, a carriage capable of transverse movement on saidsupporting frame, means for moving said carriage in either direction, avertical series of reciproeating cutting, devices mounted on and adaptedto cut forward of said carriage,

means for shifting said series of cutting de vices vertically andrelative to said carriage,

means for elevating and discharging the material removed by saidcutters, comprising a transverse conveyor and a longitudinal elevator onsaid supporting frame, a longi- 1 tudinal conveyor for each series ofcutters on said carriage designed to discharge material into saidtransverse conveyor, means for driving each of said conveyors, and ascraper for each series of cutters;

6. In a device of the class descr bed, a

supporting frame, a carriage capable of transverse movement von saidsupporting frame, means for moving said carriage in either direction, abattery of cutting devices mounted on, and adapted to out forward of"said carriage, means for shifting said cut ting devices vertically andrelative to'said carriage, means for moving'the points of said cuttingdevices transversely relative to the vertical movement of said cutters,means for elevating and discharging the material removed by saidcutters, comprisinga trans verse conveyor and a longitudinal elevator onsaid supporting frame, a longitudinal conveyor for each battery ofcutters on said carriage designed to discharge material into saidtransverse conveyor, means for driv-J ing each of said conveyors, and ascraperffor each battery of cutters.

7. In a device of the class described, a.

to cut material when the carriageis moved supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in carriage, means for swinging thelpoints of saidcutting devices transversely relative to the vertical movement of saidcutters, .means for actuating said cutters, means for elevating anddischarging the materialremoved by said cutters, comprising a transverseconveyor and a longitudinal elevator on said supporting frame, alongitudinal conveyor for each battery of cutters on said carriagedesigned to discharge material into said. transverse conveyor, means fordriving each ofsaid'conveyors, and a scraper for each battery ofcutters;

8. In a device of the class described, a supporting fraine, agcarriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, a battery of cutting devicesmounted on, and adapted to cut forward'of said carriage, means forshifting'said cutting devices vertically and relative to said carriage,means for swinging the points of said cutting devices transverselyrelative to their vertical movement, pneumatic means for actuating saidcutters, means'for elevating and discharging the material removed bysaid cutters, comprising a transverse conveyor and a longitudinalelevator on said supporting frame, a longitudinal conveyor for eachbattery of cutters on said carriage designedto discharge material intosaid transverse conveyor, means for driving each'of said conveyors, anda scraper for each battery of cutters;

9'. In a device of supporting frame, a carriage capableof transversemovement on said supporting frame, means for moving said carriage ineither direction, two batteries of cutters,

mounted on, and, adapted to cut forward of said carriage, each of saidbatteries comprising a vertical series of horizontal and reciprocatingcutters,' the cutters of one battery being designed 'to'operatein theopposite direction from'th'os'e' of the other, one of said batteriesbeing adapted to cut material when the carriage is moved in onedirectiomand the other adapted to'operate when the carriage is moved inthe reverse direction,and means for actuating said cutters, W

10. In a device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, batteries ofcutters mountedon,'and adapted tocut forward ofjfsaid carriage, one of said batteriesbeingfadapted in one direction and the other adapted to operate when thecarriage ismoved'in the reversedirection, means for actuating saidcutters, and independent means for moving the class described, a

Ill)

'riage is moved in one on, and adapted to cut forward of said carriage,one of said batteries being adapted to cut material when the carriage ismoved in one direction and the other adapted to operate whenthe carriageis moved in the reverse direction, means for actuating said cutters,independent means for moving each battery of cutters transverselyrelative to the movement of said carriage, and inde pendentmeans forswinging the points of each battery of cutters forward and ba clc ward,i

12. In a. device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame,- means formoving,- said carriage" in either direction, batteries of reciprocatingcutters mounted on and adapted to cut for- "ward of said carriage, one"oii said batteries being adapted to cut materialwhen the cardirection,and the other adapted to operate when the carriage is moved in thereverse direction, and means for actuating said cutters;

13. In ,it device of the class described, av

supporting frame, a carriage capable of transverse movement on saidsupporting frame, means for movin said carriage 1n either direction,batteries of reciprocating ruttersmounted on, and adapted tocut forwardof said carriage, one of said batteries beingadapted to cut materialwhen the, car riageis moved in one direction, and the other adapted tooperate when the carriage 1 either direction,

is moved in the reversedirection, pneumatic means for actuating saidcutters, vand .inde-.

means for actuating said cutters, independ ent means for moving each:battery of cutv ters transversely relative to the movement of saidcarriage, and means for elevating and discharging the material removedby said cutters. I,

e 15. In a device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage 1n either direction, batteriesof reciprocatingcutters mounted on and adapted to cut forward of said carriage, one ofsaid batteries being adapted to cut material when the carriage is movedin one direction, and the an d the 7 other adapted to operate when thecarriage is moved" in the reverse direction, pneumatic means foractuating said cutters, independent means for moving each battery ofcutters transversely relative to the movement of said arriage, andindependent means for moving the points of each battery of cuttersforward and backward.

16. In a device of the clas described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, batteries of reciprocatingcuttersmounted on, and adapted to cut forward ofsaid carriage, one ofsaid batteries being} adapted to cut material when-the carriage is movedin one direction, and the other adapted to operate when the carriage ismoved in the reverse direction, pneumatic means for actuating saidcutters, independentmeans fon moving each battery ofcutterst-ransversely relative to the movement of said vcarriage,independent means for movingthe points of each battery of cuttersforward and backward, and means for elevat ing and discharging thematerial removed by said. cutters.

In a'device of the classdescribed, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, batteries of reciprocatingcutters mounted on and adapted to cut forward, of said carriage, one: ofsaid batteries being adapted to cut material when the carriage'is" movedin one direction, and the other adapted to operate when the carriage ismoved in the reverse direction, pneumatic means for actuating saidcutters, independent means for moving each battery of cutterstransversely relative to the movement of said carriage, independentmeans for moving the points of each battery of cutters. forwardandbackward, means for elevating and discharging the material removed bysaid cutters, comprising a transverse conveyor anda longitudinalelevator on said supporting frame, a longitndinal conveyor for eachbattery of cutters on said carriage,

designed to discharge material into said transverse conveyor, meansfordriving each of said conveyors, and a scraper for each battery ofcutters. 7

1 8. In a device of'the class described, a supporting frame, acarriagecapable of a horizontal and a transverse movement on said supportingframe, means for moving said carriage in either direction, said carriagebeing designed tocarry vertical batteries of reciprocating cuttersmounted thereon, and adapted to out forward of said carriage, one ofsaid batteries being adapted to out material when the carriage is movedin one direction, and the other adapted to operate when mowed in thereverse direction,

means for actuating said cutters, and independent means for moving eachbattery of cutter vertically. r

19. In a device of the class described a supporting frame, a carriagecapable or a horizontal and a transverse movement on said supportingframe, means for moving said carriage in either direction, said car--triage being designed to carry vertical batteries of reciprocatingcutters mounted thereon, and adapted to cut forward of said carriage,one of said batteries being adapted to cut material when the carriage ismoved in one direction, and the other adapted to opcrate when moved inthe reverse direction, means for actuating said cutters, independentmeans for moving each battery of cutters vertically, andindependentmeans for moving the points of each battery of cuttersforwardly and baclrwardly.

20. In a device of the class described, a supporting frame, a carriagecapable of a horizontal and a transverse movement. on said supportingframe, means for moving said carriage in either direction, said carriagebeing designed to carry vertical batteries of reciprocating cuttersmounted thereon, and adapted to cut forward of said carriage, one ofsaid batteries being adapted to cut material when the carriage is movedin one direction, and the other adapted to operate when moved in thereverse direction, means for actuating said cutters, independent meansfor moving each battery of cutters vertically, independent means formoving the points of each battery of cutters forwardly and baclrwardly,and means for elerating and discharging the material removed by saidcutters.

21. In a device of the class described, a, supporting frame, a carriagecapable of a horizontal and a transverse movement on said supportingframe, means for moving said carriage in either direction, said carriagebeing designed to carry vertical batteries of reciprocating cuttersmounted thereon, and adapted to cut forward of said carriage, one ofsaid batteries being adapted to mt material when the carriage is movedin one direction, and the other adapted to opcrate when moved in thereverse direction, means for actuating said. cutters, independent meansfor moving each battery of cutters vertically, independent means formoving the points of each battery of cutters forwardly and backwardly,means for elevating and discharging the material removed by saidcutters, comprising a transverse conveyor and a longitudinal elevator onsaid supporting frame, a longitudinal conveyor for each battery ofcutters on said carriage designed to discharge material into saidtransverse conveyor, and means for driving each of said conveyors.

22. In a device of the class described, a

supporting v frame, a carriage capable of a horizontal and a transversemovement on said supporting frame, means for moving said carriage ineither direction, said can riagc being designedto carry verticalbatteries of reciprocating cutters mounted thereon, and adapted to outforward of said carriage, one of said batteries being adapted to cutmaterial when the carriage is moved in one direction, and the otheradapted to operate when moved in the reverse direction, means foractuating said cutters, independent means for moving each battery ofcutters vertically, independent means for moving the points of eachbattery of cutters forwardly and 'baclrwardly, means for elevating anddischarging the material removed by said cutters, comprising atransverse conveyor and a longitudinal elevator on said supportingframe, a longitudinal conveyor for each battery of cutters on saidcarriage designed to discharge material into said transverse conveyor,means for driving each of said conveyors and a scraper for each batteryof cutters.

23. In a device of the class described, a supporting frame, a carriagecapable of a horizontal and a transverse movement on said supportingframe, means for moving said carriage in either direction, saidcarriagebeing provided with vertical slide bars, a pivoted shaft mountedlongitudinally on each of said slide bars, a'battery of reciprocatingand laterally extending cutters on each of said shafts, the cutter endsof the cutters of each shaft being in a plane through the center of theshaft, and equidistant therefrom, the cutting edges of one battery beingopposite to those of the other, means for reciprocating said cutters,means for moving said slide bars longitudinally, and transversely withsaid carriage, and means for rocking each of said shafts to move thecutting edges of said cutter forwardly and baclrwardly.

24; In a device of the class described, a cutter head for miningmachines comprising a shaft, a series of spaced diverging cuttersmounted thereon to reciprocate longitudinally in a common planesubstantially through the center of said shaft, means for actuating saidcutters, means for supporting said cutter head, means for moving saidhead vertically and means for moving, the points of the cutter of saidhead forwardly and backwardly.

25. In a device of the class described, a supporting frame, a carriagecapable of transverse movement on said supporting frame, means formoving said carriage in either direction, two batteries ofcuttersmounted on and adapted to cut forward of said carriage, each of saidbatteries comprising a vertical series of horizontal and reciprocatingcutters, the cutters of one battery being designed to operate in theopposite direction from those of the other, one of said batteries beingadapted to cut material When the carriage ismoved in one direction, andthe other adapted to operate when the carriage is moved in the reversedirection, means for actuating said cutters, and means for shiftingeither of said batteries vertically relative to said carriage.

26. In a device of the class described, a support, a shaft having aseries of diverging cutters mounted thereon to reciprocatelongitudinally in a common plane substantially through'the center ofsaid shaft, means for oscillating said shaft, and means for movin saidshaft longitudinallyrelative to saic support.

27. In a device of the class described, a support, a shaft having aseries of diverging cutters mounted thereon to reciprocatelongitudinally in a common plane substantially through the center ofsaid shaft, means for oscillating said shaft, means for moving saidshaft longitudinally relative to said support, and means forreciprocating said cutters.

Des MCiiI16S, IOW3J, March 16, 1922.

HALVER R. STRAIGHT.

